请大家帮忙解释下代码

Sam830131 2012-07-17 03:00:36



try

            {

                System.Net.WebClient wc = new System.Net.WebClient();

                System.IO.Stream stream = wc.OpenRead(url + "?WSDL");

                System.Web.Services.Description.ServiceDescription sd = System.Web.Services.Description.ServiceDescription.Read(stream);

                System.Web.Services.Description.ServiceDescriptionImporter sdi = new System.Web.Services.Description.ServiceDescriptionImporter();

                sdi.AddServiceDescription(sd, "", "");

                System.CodeDom.CodeNamespace cn = new System.CodeDom.CodeNamespace(@namespace);

                System.CodeDom.CodeCompileUnit ccu = new System.CodeDom.CodeCompileUnit();

                ccu.Namespaces.Add(cn);

                sdi.Import(cn, ccu);



                Microsoft.CSharp.CSharpCodeProvider csc = new Microsoft.CSharp.CSharpCodeProvider();

                System.CodeDom.Compiler.ICodeCompiler icc = csc.CreateCompiler();



                System.CodeDom.Compiler.CompilerParameters cplist = new System.CodeDom.Compiler.CompilerParameters();

                cplist.GenerateExecutable = false;

                cplist.GenerateInMemory = true;

                cplist.ReferencedAssemblies.Add("System.dll");

                cplist.ReferencedAssemblies.Add("System.XML.dll");

                cplist.ReferencedAssemblies.Add("System.Web.Services.dll");

                cplist.ReferencedAssemblies.Add("System.Data.dll");



                System.CodeDom.Compiler.CompilerResults cr = icc.CompileAssemblyFromDom(cplist, ccu);

                if (true == cr.Errors.HasErrors)

                {

                    System.Text.StringBuilder sb = new System.Text.StringBuilder();

                    foreach (System.CodeDom.Compiler.CompilerError ce in cr.Errors)

                    {

                        sb.Append(ce.ToString());

                        sb.Append(System.Environment.NewLine);

                    }

                    throw new Exception(sb.ToString());

                }

                System.Reflection.Assembly assembly = cr.CompiledAssembly;

                Type t = assembly.GetType(@namespace + "." + classname, true, true);

                object obj = Activator.CreateInstance(t);

                System.Reflection.MethodInfo mi = t.GetMethod(methodname);

                return mi.Invoke(obj, args);

            }

            catch (Exception ex)

            {

                throw ex;

            }